US5799247A - Filter - Google Patents

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Publication number
US5799247A
US5799247A US08/678,764 US67876496A US5799247A US 5799247 A US5799247 A US 5799247A US 67876496 A US67876496 A US 67876496A US 5799247 A US5799247 A US 5799247A
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US
United States
Prior art keywords
filter
radio equipment
equipment according
construction
shell construction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/678,764
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English (en)
Inventor
Jari Lapinlampi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solitra Oy
Powerwave Finland OY
Intel Corp
Original Assignee
ADC Solitra Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Assigned to SOLITRA OY reassignment SOLITRA OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LAPINLAMPI, JARI
Application filed by ADC Solitra Oy filed Critical ADC Solitra Oy
Application granted granted Critical
Publication of US5799247A publication Critical patent/US5799247A/en
Assigned to ADC SOLITRA OY reassignment ADC SOLITRA OY CHANGE OF ADDRESS Assignors: ADC SOLITRA OY
Assigned to POWERWAVE TECHNOLOGIES, INC. reassignment POWERWAVE TECHNOLOGIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REMEC, INC.
Assigned to WELLS FARGO FOOTHILL, LLC, AS AGENT reassignment WELLS FARGO FOOTHILL, LLC, AS AGENT PATENT SECURITY AGREEMENT Assignors: POWERWAVE TECHNOLOGIES, INC.
Assigned to POWERWAVE TECHNOLOGIES, INC. reassignment POWERWAVE TECHNOLOGIES, INC. RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: WELLS FARGO CAPITAL FINANCE, LLC, FKA WELLS FARGO FOOTHILL, LLC
Assigned to P-WAVE HOLDINGS, LLC reassignment P-WAVE HOLDINGS, LLC SECURITY AGREEMENT Assignors: POWERWAVE TECHNOLOGIES, INC.
Assigned to P-WAVE HOLDINGS, LLC reassignment P-WAVE HOLDINGS, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: POWERWAVE TECHNOLOGIES, INC.
Assigned to POWERWAVE TECHNOLOGIES S.A.R.L. reassignment POWERWAVE TECHNOLOGIES S.A.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: P-WAVE HOLDINGS, LLC
Assigned to INTEL CORPORATION reassignment INTEL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: POWERWAVE TECHNOLOGIES S.A.R.L.
Assigned to POWERWAVE TECHNOLOGIES S.A.R.L. reassignment POWERWAVE TECHNOLOGIES S.A.R.L. CORRECTIVE ASSIGNMENT TO CORRECT THE LIST OF PATENTS ASSIGNED TO REMOVE US PATENT NO. 6617817 PREVIOUSLY RECORDED ON REEL 032366 FRAME 0432. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF RIGHTS IN THE REMAINING ITEMS TO THE NAMED ASSIGNEE. Assignors: P-WAVE HOLDINGS, LLC
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters

Definitions

  • the invention relates to a filter for use in a radio equipment, said filter comprising a shell construction with at least one section, and one or more conductor means mounted in the sections of the shell construction.
  • the invention further relates to a filter used in a radio equipment, said filter comprising a shell construction with at least one section.
  • the invention can be applied to coaxial and helix-type filters with a conductor means, but also to cavity resonator-type filters.
  • radio equipment used above refers to a transmitter, receiver or transceiver of a high-frequency range, or another apparatus that needs a filter in order to function.
  • the invention is particularly applicable to base stations and mobile stations, i.e. terminal equipments, used in a cellular radio network.
  • Filters are used for implementing high-frequency circuits, for instance in base stations or mobile stations of mobile telephone networks. Filter constructions can be used, for example, as interface and filtering circuits in the amplifiers of transmitter and receiver units in base stations.
  • filters comprising a shell construction, or body: e.g. coaxial and helix resonator constructions.
  • the shell envelops a conductor which is positioned in the middle of the shell and which is called a resonator or resonator pin.
  • the conductor is shaped as a pin, whereas in helix resonators it is spiral.
  • the filter is a separate enclosed component which is positioned in a recess in the body of the phone.
  • An enclosed component takes a lot of space and is heavy; it is also expensive and slow to manufacture.
  • the grounding is not the best possible, either.
  • DT 2422398 discloses a filter construction; however, the shell construction of this filter is a separate part attached to the actual body of the phone. Thus even this solution has the above drawbacks.
  • the object of the present invention is to provide a new type of filter which obviates the problems associated with the known solutions.
  • a filter of the invention which is characterized in that the shell construction of the filter is provided as a fixed part of the body, shell or a similar mechanical construction of the radio equipment, and that the shell construction of the filter is integral with said body, shell or similar mechanical construction of the radio equipment.
  • the solution of the invention has several advantages.
  • the new structure efficiently utilizes the body of a radio equipment, such as a terminal equipment or a base station, as part of the filter; this simplifies the mechanical structure of the equipment, since the same structural element has two different functions.
  • the solution of the invention saves space and reduces the weight, which is particularly important in portable terminal equipments, i.e. mobile phones.
  • the new solution is also inexpensive to manufacture.
  • the solution of the invention leaves more space to the conductor means of the filter, e.g. the helix coils or resonators, which makes it possible to provide a filter with better properties.
  • Yet another advantage is that the grounding of the filter is improved, and disturbances and RF leakages are reduced.
  • the invention is applicable, for example, to helix and coaxial-type filters, and also to cavity resonators.
  • FIG. 1 shows the body of a radio equipment, such as a mobile phone, and the coils of a helix filter,
  • FIG. 2 shows the coils of a helix filter on a separate printed board
  • FIG. 3 shows the body of a radio equipment and a filter mounted therein
  • FIG. 4 shows the coils of a helix filter and other components of the radio equipment on the actual printed board of the radio equipment
  • FIG. 5 shows the body of a terminal equipment, coated with a conductive material and viewed from the end of the filter facing the shell construction.
  • FIG. 3 illustrates a construction which is formed from the parts shown in FIGS. 1 and 2 and which comprises the body 1 of a radio equipment, and a filter 2.
  • the filter 2 comprises a shell construction 3 positioned in the body 1 of the radio equipment, conductor means 4-9 such as helix coils 4-9, and a support structure such as a printed board 10, on which the helix coils 4-9 are mounted.
  • the printed board comprises a desired switching diagram and, if necessary, some auxiliary components.
  • the filter shown in the figures is, in fact, a duplex-type filter comprising a transmitting filter TX and a receiving filter RX.
  • the filter further comprises an antenna interface, to which the antenna line is connected, and an interface for connecting the filter to the radio parts such as the radio unit 55-56.
  • the helix coils 4-9 are spiral conductors one ends of which are unconnected, i.e. free.
  • the invention thus relates to a high-frequency filter 2 used in connection with a radio equipment, such as a terminal equipment or a base station of a cellular network.
  • the filter thus comprises a shell construction 3 with at least one section, e.g. six sections 14-19.
  • the filter comprises at least one conductor means, e.g. six conductor means 4-9, or helix coils 4-9, or helix resonators 4-9.
  • the conductor means 4-9 are mounted in the sections 14-19 of the shell construction 3, which can be seen from FIGS. 1 to 3, particularly from FIG. 3. Especially from FIGS.
  • the shell construction 3, 14-19 of the filter 2 is made as a fixed part of the body, shell or a similar mechanical construction of the radio equipment.
  • the example shown in FIGS. 1 and 3 applies particularly to the body 1 of a mobile phone, but the invention can also be implemented with the shell construction of a radio equipment.
  • a mechanical construction of the radio equipment forms at least the main part of the shell construction 3 of the filter 2 in the radio equipment.
  • the filter 2 is a filter used in a terminal equipment of a cellular radio network.
  • the shell construction 3 of the filter 2 is a fixed part of the body 1 of the terminal equipment and integral with the body of the terminal equipment, i.e. they are made in one piece.
  • the shell construction 3 of the filter 2 is a fixed part of the shell construction 1 of the terminal equipment and integral with it.
  • the body 1 of the radio equipment, or correspondingly the shell construction of the radio equipment, and the shell construction 3 of the filter 2 mounted therein can be manufactured, for example, by pressure moulding, milling, or impact extrusion. Another alternative manufacturing technique will be described below with reference to FIG. 5.
  • the filter according to a preferred embodiment is a duplex filter 2 comprising a transmitting filter and a receiving filter.
  • the body 1, shell or a similar mechanical construction of the radio equipment forms the shell construction 3 of both the transmitting filter TX and the receiving filter RX.
  • the filter is a multi-circuit filter and comprises a plurality of conductor means 4-9, a plurality of sections 14-19 in the shell construction, and partitions 30 between the sections. It can be seen from FIG. 2 that the cavities 14-19 provided in the body 1 of the mobile phone form the shell construction 3 for the helix coils 4-9 on a printed board. In such a filter, the partitions 30 are a fixed and integral part of the body 1 or shell construction of the radio equipment.
  • the conductor means 4-9, e.g. helix coils 4-9, in the filter 2 are mounted on a support structure 10, e.g. a printed board 10.
  • the support structure 10 comprises a conductive area 50 in direct contact with the body 1 or shell of the radio equipment. This is an easy way of providing proper grounding for the filter 2.
  • the conductor means 4-9 are mounted on the same support structure 60 as the actual radio parts 55-56, e.g. the radio unit 55-56, of the radio equipment.
  • the conductor means 4-9 e.g. the helix coils 4-9, are integrated with the actual printed board 60 of the radio equipment.
  • This ⁇ double-integrated ⁇ solution has the advantage of simplifying the structure of the filter and the entire radio equipment.
  • FIG. 5 illustrates a preferred embodiment with respect to the manufacturing technique, the shell construction 3 of the filter, and the body construction 1 of the radio equipment.
  • at least the shell construction 3 of the filter comprises a coating 3a which is of a conductive material and which is provided on a basic material 3b of e.g. plastic.
  • a coating 3a which is of a conductive material and which is provided on a basic material 3b of e.g. plastic.
  • the shell construction 3, 3a, 3b of the filter is made as a fixed part of the body 1, shell or a similar mechanical construction 1 of the radio equipment, and that the shell construction 3, 3a, 3b of the filter is integral with said body 1, shell or similar mechanical construction 1 of the radio equipment.
  • an object 1b, 3b is thus at first injection moulded from a basic material, such as plastic, and then coated with a conductive coating 1a, 3a, such as a metal coating.
  • a basic material such as plastic
  • a conductive coating 1a, 3a such as a metal coating.
  • the solution that is the simplest and has the best electrical properties is a construction which is coated throughout, at least on the side with the shell construction 3 of the filter. When the coating adheres to the material to be coated, the coating and the basic material become integral.
  • the different embodiments of the invention are for the most part also applicable to filters of the cavity resonator and coaxial resonator type, although the examples relate mainly to a helix-type filter.
  • the shell construction may be similar to the one described above except that the filter does not comprise conductor means, i.e. resonators.

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Structure Of Receivers (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Centrifugal Separators (AREA)
  • Fluid-Pressure Circuits (AREA)
US08/678,764 1995-11-08 1996-07-11 Filter Expired - Lifetime US5799247A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI955385A FI110391B (fi) 1995-11-08 1995-11-08 Kotelorakenteinen suodatin
FI955385 1995-11-08

Publications (1)

Publication Number Publication Date
US5799247A true US5799247A (en) 1998-08-25

Family

ID=8544350

Family Applications (1)

Application Number Title Priority Date Filing Date
US08/678,764 Expired - Lifetime US5799247A (en) 1995-11-08 1996-07-11 Filter

Country Status (8)

Country Link
US (1) US5799247A (it)
CH (1) CH694262A5 (it)
DE (1) DE29619226U1 (it)
FI (1) FI110391B (it)
FR (1) FR2741490B3 (it)
GB (1) GB2307366B (it)
IT (1) IT239843Y1 (it)
SE (1) SE519925C2 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6356172B1 (en) 1999-12-29 2002-03-12 Nokia Networks Oy Resonator structure embedded in mechanical structure

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728731A (en) * 1971-07-02 1973-04-17 Motorola Inc Multi-function antenna coupler
DE2422398A1 (de) * 1974-05-09 1975-11-13 Siemens Ag Gehaeuse fuer ein geraet der elektrischen nachrichtentechnik, insbesondere richtfunktechnik
US4019141A (en) * 1976-03-22 1977-04-19 Motorola, Inc. Preselector cavity arrangement and RF selectivity assembly
US4100504A (en) * 1977-06-20 1978-07-11 Harris Corporation Band rejection filter having integrated impedance inverter-tune cavity configuration
GB2143092A (en) * 1983-07-08 1985-01-30 Philips Nv Method of manufacturing a waveguide filter
US4689825A (en) * 1981-08-26 1987-08-25 Deutsche Thomson Brandt Gmbh Receiver stage for radio or television receiver
US4990869A (en) * 1988-11-04 1991-02-05 U.S. Philips Corporation UHF bandpass filter
EP0441590A1 (en) * 1990-02-07 1991-08-14 Lk-Products Oy High frequency filter
EP0560503A1 (en) * 1992-03-09 1993-09-15 Lk-Products Oy Electrical filter
US5278528A (en) * 1991-04-12 1994-01-11 Lk-Products Oy Air insulated high frequency filter with resonating rods
US5508668A (en) * 1993-04-08 1996-04-16 Lk-Products Oy Helix resonator filter with a coupling aperture extending from a side wall
US5534829A (en) * 1993-05-31 1996-07-09 Sanyo Electric Co., Ltd. Antenna duplexer
US5585771A (en) * 1993-12-23 1996-12-17 Lk-Products Oy Helical resonator filter including short circuit stub tuning

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728731A (en) * 1971-07-02 1973-04-17 Motorola Inc Multi-function antenna coupler
DE2422398A1 (de) * 1974-05-09 1975-11-13 Siemens Ag Gehaeuse fuer ein geraet der elektrischen nachrichtentechnik, insbesondere richtfunktechnik
US4019141A (en) * 1976-03-22 1977-04-19 Motorola, Inc. Preselector cavity arrangement and RF selectivity assembly
US4100504A (en) * 1977-06-20 1978-07-11 Harris Corporation Band rejection filter having integrated impedance inverter-tune cavity configuration
US4689825A (en) * 1981-08-26 1987-08-25 Deutsche Thomson Brandt Gmbh Receiver stage for radio or television receiver
US4706051A (en) * 1983-07-08 1987-11-10 U.S. Philips Corporation Method of manufacturing a waveguide filter and waveguide filter manufactured by means of the method
GB2143092A (en) * 1983-07-08 1985-01-30 Philips Nv Method of manufacturing a waveguide filter
US4990869A (en) * 1988-11-04 1991-02-05 U.S. Philips Corporation UHF bandpass filter
EP0441590A1 (en) * 1990-02-07 1991-08-14 Lk-Products Oy High frequency filter
US5278528A (en) * 1991-04-12 1994-01-11 Lk-Products Oy Air insulated high frequency filter with resonating rods
EP0560503A1 (en) * 1992-03-09 1993-09-15 Lk-Products Oy Electrical filter
US5508668A (en) * 1993-04-08 1996-04-16 Lk-Products Oy Helix resonator filter with a coupling aperture extending from a side wall
US5534829A (en) * 1993-05-31 1996-07-09 Sanyo Electric Co., Ltd. Antenna duplexer
US5585771A (en) * 1993-12-23 1996-12-17 Lk-Products Oy Helical resonator filter including short circuit stub tuning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6356172B1 (en) 1999-12-29 2002-03-12 Nokia Networks Oy Resonator structure embedded in mechanical structure

Also Published As

Publication number Publication date
FI955385A0 (fi) 1995-11-08
ITTO960223U1 (it) 1998-05-08
GB2307366B (en) 1997-10-08
SE9604093D0 (sv) 1996-11-08
ITTO960223V0 (it) 1996-11-08
GB2307366A (en) 1997-05-21
IT239843Y1 (it) 2001-03-13
FI110391B (fi) 2003-01-15
FI955385A (fi) 1997-05-09
CH694262A5 (de) 2004-10-15
SE9604093L (sv) 1997-05-09
DE29619226U1 (de) 1997-01-16
GB9623260D0 (en) 1997-01-08
FR2741490A3 (fr) 1997-05-23
FR2741490B3 (fr) 1997-10-10
SE519925C2 (sv) 2003-04-29

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